/in/foo.cc:8:9: error: extended character — is not valid in an identifier
    8 |         i—-;
      |         ^
/in/foo.cc: In function 'void dfs(int)':
/in/foo.cc:8:9: error: 'i\U00002014' was not declared in this scope
    8 |         i—-;
      |         ^~
/in/foo.cc:8:12: error: expected primary-expression before ';' token
    8 |         i—-;
      |            ^